Guitar Saddle Adjustment Guide: Raising and Lowering Action on Acoustic and Electric

Action is the height of the strings above the fretboard. Get it right and playing becomes effortless. Get it wrong and even great gear can't save you.

Measuring Action

Action is measured at the 12th fret, between the bottom of the string and the top of the fret.

Standard action guidelines (at 12th fret): - Acoustic low E: 2.5-3.5mm - Acoustic high e: 2.0-2.5mm - Electric low E: 1.5-2.0mm - Electric high e: 1.0-1.5mm

These are starting points. Some players prefer lower (faster) or higher (more resonance, acoustic volume).

Acoustic Guitar Saddle

The acoustic saddle is a bone or synthetic piece that sits in a slot in the bridge. Height is adjusted by:

To lower: Remove the saddle, place sandpaper on a flat surface, sand the bottom of the saddle evenly. Check frequently.

To raise: Add a thin shim under the saddle (plastic, bone, or metal). Or install a taller replacement saddle.

Important: Always lower the saddle from the bottom — never file the top/string contact surface, as this ruins intonation.

Electric Guitar Saddle

Electric saddles are typically individually height-adjustable with Allen keys or screws. Most bridges (Fender-style, tune-o-matic) allow per-saddle adjustment for a precise setup.

Procedure: 1. Measure current action at 12th fret 2. Calculate how much to change 3. Adjust saddle height (note: 1mm at the saddle = roughly 0.5mm change at 12th fret due to leverage) 4. Retune and re-measure 5. Check intonation after any significant adjustment

When to See a Tech

If action is extremely high (3mm+ on electric), the neck may need a truss rod adjustment first. Saddle adjustment alone won't fix a severely bowed neck.

Need a Saddle Replacement?

Our Pro Concierge can help identify the correct saddle dimensions for your specific guitar model.